What was found
AIRCRAFT DEVELOPED A VERTICAL VIBRATION IN FLIGHT. NOTIFIED MAINTENANCE. FRAHM DAMPER SPRING HAD FAILED. REMOVED AND INSTALLED FOUR NEW FRAHM DAMPER SPRINGS IAW MM. (K)
- Difficulty date
- August 25, 2005
- Submitted
- September 13, 2005
- Operation
- Air carrier
- Aircraft
- N537AL
- Make and model
- Bell 407
- Aircraft serial
- 53230
- Engine
- Allsn 250C47B
- System (JASC)
- 6220 · Main Rotor Head
- Part
- Spring
- Part number
- 407310104105
- Condition
- Failed
- Location
- Frahm
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- E
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.